Picture frame



FIG. 1 is a front perspective view of a picture frame showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a cross-sectional view thereof taken along line 5--5 in FIG. 2. 

The ornamental design for a picture frame, as shown. 